Orifice disk for steam radiators



Jan. 9, 1934. w. TALLMADGE 1,942,783

ORIFICE DISK FOR STEAM RADIATORS Filed Feb. 21, 1931 INVENTOR.

ATTORNEY Patented Jan. 9, 1934 UNITED STATES 1,942,783 r ORIFICE DISK FOR STEAM RADIATORS Webster Tallmadge, Montclair, N. .l., assignor to Webster Tallma'dge & Company Inc., New York, Y., a corporation of New York Application February 21, 1931. Serial No. 517,391

5 Claims.

This invention relates to steam heating systems, and the object thereof as to provide a cheap, simple and durable means for accurately determining and controlling the amount of steam admitted to the radiators in the system.

According to present day practice the valved inlet pipes of radiators are mostly of threefourths inch diameter, a few being of one-half and still fewer of one inch or larger diameter, and the valve union is formed with acoupling nut between a conically-faced end of the radiator valve body and the adjacent convexly-curved inlet end of a tail piece ornipple. In some cases the steam is further controlled by passing it through an orifice, of graduated size, punched;

axially in a thin flat disk which either is more or less permanently fixed within the, outer end of the tail piece or is loosely inserted as a washer in a shouldered recess formed around the bottom of the conically-faced end of the valve body. It is impossible, however, to control with any degree of accuracy the amount of steam admitted to a radiator through such an orifice. The orifice cannot be punched to accurate size and gradually becomes enlarged by erosion or otherwise, there is apt to be more or less leakage around the disk where inserted in the valve body, and when fixed in the outlet end 01' the tail piece can be set therein in an old plant, or removed and replaced, only after uncoupling the union and unscrewing the tail piece the threads of which usually become quite corroded.

I have obviated all of the above defects by my present invention, which consists, broadly stated, in a cupped disk of soft metal which is inserted, within the coupling nut,'between the-adjacent Iaced'ends of the union and serves as a gasket to form a steam-tight Joint and which is provided .with a thicker central hub, of a metal resistant to till erosion and corrosion, through which the somewhat elongated orifice'is drilled.

The invention will be understood by reference to the accompanying illustrative drawing, in which- Figure 1 is a face or plan view of a blank for, and Figs. 2 and 3 are, respectively, face and sectional views of, an orifice disk embodying my. invention; Figs. 4 and 5 are face and sectional views, respectively, of a modified form thereof; and Fig. 6 is a sectional view of a further modification.

In the preferred form of the device shown in Figs. 1-3, the disk 11 and hub 12 are integral and are made of any suitable material, preferably a metal resistant to erosion and corrosion. Freeproper, and the disk is cupped by stamping up or 50 spinningthe flanged rib c and the orifice d drilled through the hub.

The great majority of the valved inlet pipes of radiators are, as stated, of three-fourths inch diameter. Hence, most of the orifice disks will 05 be made to fit such pipes. For one-half inch pipes the diameter of the hub will be correspondingly reduced, and, for the larger sized pipes, both the diameter and the thickness of the hub can be increased, if desired. In all cases it will be found that the disk, when slipped into place between the faced ends of the union, will be better held in position and more easily pressed into the shape of the faces of the union .when the coupling nut is screwed up to close the union if the flaring rim 76 of the disk is of a width to extend nearly out to the periphery of the conically-faced end of the valve body. The taper of these conically-fa'ced ends varies somewhat, the mean taper being the disk it will fit approximately any make of radiator union on the market and will readily conform exactly to the tapered union face when the parts are forced together by the coupling nut, while the softness of the metal of the rim assures a steam-tight joint. The orifice through the hub is accurately drilled to the desired size, preferably of a diameter to give it an area for the passage therethrough of steam according to the characteristic steam-flow curve, as set forth in my earlier application Serial No. 410,513, filed November 29, 1929, the area-being uniform for all radiators of the same size, 1. e., the same heat about 54; and by giving this angle to the rim of 8b transfer capacity. And it has been found that 1 the noise from the flow of steam through the disk when the hub is inserted within theopening provided therefor in the disk; and the parts are secured together in any suitable way, as by stakes e stamped from the end of the hub (Figs. 4 and orifice can be appreciably lessened, if not en-- against what may be called the back of the cupped 5), by making the opening in the disk slightly smaller than the hub and pressing or crimping its edge into an annular depression e" around the hub close to the shoulder (Fig. 6), or by hard soldering. The integral structure, however, is preferred not only because the hub cannot become loosened in the disk butalso tor the reason that, without the shouldered projection 01' the hub at the back of the. disk, the device can more readily he slipped into and out of place between the faced ends of the union.

Among the advantages of my new orifice disk the following may be mentioned. Agiven size of the precise drilling of the orifice, and the extended bore of the orifice through the thickened hub provide a far greater and more permanent accuracy of the flow of steam to a radiator than could be obtained by an orifice in a thin disk,

no matter how carefully the orifice may havebeen drilled.

It is to be understood that the device can be variously modified inits several details, within the scope of the appended claims, without depar- ,.ting from the spirit or sacrificing the substantial advantages thereof. u

What I claim as new, and desire to secure by Letters Patent, is-

1. A device of the character described consisting of a cupped disk having only a flanged rim of soft metal oil'set at an angle of approximately 54 and a relatively thick central part of harder metal with restricted axial bore providing an elongated cylindrical orifice of relatively small diameter.

2. As a new article of manufacture, an integral unitary cupped orifice disk consisting of a metallic disk having a taperingly flanged rim of relatively soft metal and a harder central hub-like portion projecting therefrom wholly on the side within the rim, said central'portion having a cylindrical bore therethrough providing an elongated orifice of relatively small diameter.

3. As a new article of manufacture, an integral unitary cupped orifice disk consisting of a disk of free-turning brass having a softened flanged rim ofiset at an obtuse angle and a relatively thick central portion with axial bore providing an elongated cylindrical orifice of relatively small diameter.

4. As a new article of manufacture, an integral unitary cupped steam inlet disk consisting of a disk of free-turning brass having a softened flanged rim offset at an angle of approximately 54 and a relatively thick central portion with accurately drilled axial bore providing an elongated orifice of relatively small diameter.

5. As a new article of manufacture, an integral unitary cupped steam inlet disk consisting of e disk of a metal like brass, resistant to erosion and corrosion, havinga flanged rim offset at an angle of approximately 54 and a central hub flush at one end with the outer side of the disk and projecting from its inner side within the flanged rim and drilled axially to provide 9. cylindrical orifice of relatively small diameter and taperingly enlarged at the extremity onlyof the end within the projecting end of the hub, the metal beingtreated to render it soft through the rim portion of the disk I WEBSTER TALLMADGE. 

